The Number 31 class was a group of four small multi-purpose motor launches of the Royal Romanian Navy.

They served on the Danube and in the Black Sea aboard the escort minelayer Amiral Murgescu.

[2] During the first month of Operation Barbarossa, as part of the prelude to Operation München, two of the Danube launches supported the Romanian 15th Marine Infantry Battalion in its successful defense of the Stipoc Island in the Danube Delta against Soviet attacks.

In the summer of 1941, this launch was used to sweep a mine and bring it ashore, where it was defused.

[4] This article about a specific military ship or boat of Romania is a stub.